Apparatus for preparing dough.



, Patented Mar. 6, I900. J. SCHWEITZER.

APPARATUS FOR PREPARING DOUGH.

Application filed Dec. 2'7, 1897.) w (No Modal.) 2 Sheets-Sheet l.

FIG].

No. 644,873. Patsntad Mzuafi, I900,

J. SCHWEITZER. APPABATUS FOR PREPARING DOUGH.

(Application med mam, 1897.) (Ho Model.)

2 Sheets-Shem 2.

i 4 is a horizontal section of the kneading ap- N'ITQED STATES PATENT OFFICE.

JOSEPH SOHWEITZER, or PARIS, I RANOE, 'ASSIGNOR 'ro LA sooii rrE' INTERNATIONALE DE MEUNERIE ET DE PANIFIOATION, (sYsTicME SCI-IWEITZER,) OF BRUSSELS, BELGIUM.

APPARATUS FOR PREPARING DOUGH.

SPECIFICATION forming part of Letters Patent No. 644,873,'datec1 March 6, 1900.

Application filed December 27, 1897. Serial No. 664,538. (No model.)

paring dough, and hasfor its object the provision of effective and economical means .for continuously and uniformly mixing and kneading the said dough.

Referring to the drawings accompanying this specification, Figure 1 shows a sectional elevation of the en tire apparatus. Figs. 2 and 3 are sections of the mixing-channel, showing two modifications of the mixing device. Fig.

paratus. Fig. 5 is a sectional elevation of the same.

' In the drawings, A represents the meal-box, preferably in the form of a hopper and the outlet thereof regulated by a revolving distributer a or the like.

'B is a tank containing water suitably'salted and kept at the proper temperature by means of asteam-jack'et b, or by means of asteam coil or worm, (shown in dotted lines in the drawings,) or by other convenient, means.

G is a barm or yeast vessel which is also heated to the proper temperature by a steam-- jacket 0 and in which is arranged an agitator serving to thoroughly mix and stir up the substances placed in the vessel 0.

This apparatus is preferably constructed as follows: .On the vertical shaft 01, driven either by hand or by means of gearing,'as shown, actuated by a pulley d or equivalent means, are fixed two metallic rods or wires D, coiled so as to form two concentric spirals of a different diameter having equal but inverse pitches. At the points where these two spirals meet they may advantageously'be connected together by means of screws or the like, thus strengthening the apparatus,which-.

may be further strengthened by attaching it to the central shaft 02 by means of intermediate arms connected to the spirals, as well as.

by attaching .the spiralsto the shaft at top and bottom, as shown. When .the aforesaid mechanism is caused to rotate, it will thoroughly mix the substances in the vessel Gand also tendto raise any deposit which may form at the bottom, and thus secure the homogeneity of the contents. The mixing apparatus consists of the tube, box, or channel E, having located within it the spiral or spirals e, preferably two in number,placed parallel one to another and rotated bya pulley e or other convenient device. In Fig. 2 two spirals e are shown, and in Fig. 3 three such spirals partially intersecting are illustrated. The

speed of these spirals'may be the same or dif ferent one from another, or one may be rotated in the one direction and the other in the opposite'direction, as may be found desirable. The mixing-channel D is connected to the. kneading-trough H by the tube R, to the water vessel .B by means of the pipe F, having stop-cock f, and to the yeast vessel. 0 by means of the pipe G with stop-cock g. .The kneading-trough H is shown in Fig. 1 in combination with the rest'of the machine, in Fig. 4 in transverse section viewed from above, and in Fig. 5 in transverse section-in elevation. This apparatus consists, essentially, of acylinder H, mounted on trunnions and having internally a longitudinal axial shaft bearing a number of arms provided with spindles or blades, as shown. The trough H has an inlet-opening communicating with the tube R,

and the worm-wheel V, operated by the handwheel is on the. worm-shaft, whereby the ftrough H can be set at any desiredaugle.

The trough H is provided internally with the v shaft 2', carrying arms 1), on which are fixed spindles q, arranged to alternate during the revolution of the shaft with similar spindles n on the fixed arms m. tin'uous preparation and delivery of the dough supplied through the tube It anddelivered from the outlet I take place. It is a special feature of my invention that the aforesaid spindles n and the spindles q,

By this device conbetween which the kneading and drawing out of the dough are etfectedIare arranged parallel to the axis of rotation e of the apparatus, whereas in'various kinds of dough-kneading rco apparatus hitherto used having fixed and movable spindles for working the dough the said spindles are placed transversely to the" axis of rotation, and they consequently continuously cut the dough into which the movable-spindles enter. In my improved device, on the contrary, the dough is constantly lengthened by the action of the spindles and it soon stretches out in strips which tend to wind up in the form of skeins on the movable spindles aforesaid. The'number of fixed arms m and of the spindles it maybe varied, as well as the n. umber of movable arms 19 and their spindles q, andthese spindles n andq, respectively, may be secured either at right angles or obliquely on the arms supporting the same and may be made straight, as shown in the drawings, or more or less curved, as desired.

WVith regard to the stationary arms m, bearin g the spindles n, it should be explained that these arms are devised toremain stationary during the revolution of the arms For this purpose they are preferably mounted loose upon the central shaft t and their rotation is prevented by striking against the projections t, fixed to the sides of the cylinder. By means of the worm-wheel and gearing aforesaid the trough H can have'given to it. any desired amount of inclination. The shaft 1? is driven by meansof the gear-wheels d d. The wheel d is keyed upon a shaft 2", which 4 is actuated by means of fixed and loose pulleys by the interposition of the cone-gearing r r. The Wheel r is preferably arranged on a prolongation of the trunnion O in such a manner that the shaft 1 will be actuated in the same mannerwhateve'rmay be the degree of inclination of the trough H.

The apparatus operates as follows: The meal arriving from the rotatingdistributer a and the salted water supplied through the pipe F, controlled by the cock f, are thoroughly agitated and mixed together by the rapid rotation of the spiral wires 2. The dough thus formed receives, near the center of the channel E, the diluted yeast arriving from the vessel 0 through the piperG, controlled by the cock g. The mixing of the dough continues until the same reaches the end of the channel E, the length of which is designed'acskeins or strips. The dough is thus subjected under large surfaces constantly renewed to the action of the air reaching it either naturally or blown by artificial means into the apparatus. The dough gradually descends in I consequence of the'inclined position in which 1. In a mixer, a hopper for solid material,

a mixing-channel, a tank for liquid-supply connected to said channel, means for'mixing the liquid and-solid in said channel, a kneadi'ng-trough,meaus for altering and fixing-the inclination of said trough, a longitudinal shaft in's'aid trough, gearing for continuously rotating the said shaft at all inclinations of the trough, loose arms on said shaft bearing spindles sensibly parallel to the centralshaft, stepson the internal walls of said kneadingtrough' preventing the rotation of said arms, arms rigidly secured on saidshaft and rotat' ing therewith, and spindles on said rotating arms parallel to and intermediate with the stationary spindles aforesaid.

2'. In a dough-mixer, the meal-hopper A,

' water-tank B, yeast vessel 0 provided with duplex spiral stirrer D, mixing-channel E, spiral mixing-wires e in combination with the kneading-trough Hsupported on trunnions O and provide'd with geared shaft 11, loose arms m, spindles it, stops :5, arms pand spindles q.

3. In adevice of the character described, a trough, a shaft journaled therein, loose arms on said shaft bearing spindles parallel to the shaft, stops on the trough preventing the rotation of said arms, arms rigidly secured on said shaft to rotate therewith, and spindles on said rotating arms parallel to and intermediate of the stationary spindles, sub- ,stantially as described.

t. In a device of the character described, a

trough mounted on suitable bearings, means journaled in the trough, gearing for continuously rotating the shaft at all inclinations of secured on the shaft and bearing spindles intermediate of and parallel to the first-named spindles, a conduit-containin g parallel wormscrews discharging into the trough, and a flour-hopper, a salt-water tank and. a yeast vessel discharging into the conduit, substan-. tially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH- SUHWEITZER.

Witnesses:

JACQUES CONDOMY, LEON MARTYE.

for inclining the trough in its bearings, a shaft 1 IIO 

